#!/usr/bin/env ruby

# -------------------------------------------------------------------------- #
# Copyright 2002-2016, OpenNebula Project, OpenNebula Systems                #
#                                                                            #
# Licensed under the Apache License, Version 2.0 (the "License"); you may    #
# not use this file except in compliance with the License. You may obtain    #
# a copy of the License at                                                   #
#                                                                            #
# http://www.apache.org/licenses/LICENSE-2.0                                 #
#                                                                            #
# Unless required by applicable law or agreed to in writing, software        #
# distributed under the License is distributed on an "AS IS" BASIS,          #
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   #
# See the License for the specific language governing permissions and        #
# limitations under the License.                                             #
#--------------------------------------------------------------------------- #

ONE_LOCATION=ENV["ONE_LOCATION"]

if !ONE_LOCATION
    RUBY_LIB_LOCATION="/usr/lib/one/ruby"
else
    RUBY_LIB_LOCATION=ONE_LOCATION+"/lib/ruby"
end

$: << RUBY_LIB_LOCATION
$: << RUBY_LIB_LOCATION+"/cli"

require 'command_parser'
require 'one_helper/oneacct_helper'

require 'json'

cmd = CommandParser::CmdParser.new(ARGV) do

    @formats = Hash.new

    usage "`oneshowback` <command> [<options>]"
    description ""
    version OpenNebulaHelper::ONE_VERSION

    helper=OpenNebulaHelper::OneHelper.new

    before_proc do
        helper.set_client(options)
    end

    command :list, "Returns the showback records", :options =>
        AcctHelper::SHOWBACK_OPTIONS + CommandParser::OPTIONS +
        [OpenNebulaHelper::DESCRIBE, CLIHelper::LIST, CLIHelper::CSV_OPT] +
        OpenNebulaHelper::CLIENT_OPTIONS do

        if options[:describe]
            AcctHelper::SHOWBACK_TABLE.describe_columns
            exit(0)
        end

        filter_flag = (options[:userfilter] || VirtualMachinePool::INFO_ALL)

        start_month = -1
        start_year  = -1

        if (options[:start_time])
            start_month = options[:start_time].month
            start_year  = options[:start_time].year
        end

        end_month = -1
        end_year  = -1

        if (options[:end_time])
            end_month = options[:end_time].month
            end_year  = options[:end_time].year
        end

        common_opts = {
            :start_month => start_month,
            :start_year  => start_year,
            :end_month   => end_month,
            :end_year    => end_year,
            :group      => options[:group],
            :xpath      => options[:xpath]
        }

        pool = OpenNebula::VirtualMachinePool.new(helper.client)

        if options[:json] || options[:xml]
            xml_str = pool.showback_xml(filter_flag, common_opts)
            if OpenNebula.is_error?(xml_str)
                puts xml_str.message
                exit -1
            end

            if options[:json]
                xmldoc = XMLElement.new
                xmldoc.initialize_xml(xml_str, 'SHOWBACK_RECORDS')

                puts JSON.pretty_generate(xmldoc.to_hash)
            elsif options[:xml]
                puts xml_str
            end

            exit_code 0
        else

            order_by = Hash.new
            if !options[:csv]
                order_by[:order_by_1] = 'YEAR'
                order_by[:order_by_2] = 'MONTH'
            end

            data_hash = pool.showback(filter_flag,
                                        common_opts.merge(order_by))
            if OpenNebula.is_error?(data_hash)
                puts data_hash.message
                exit -1
            end

            if options[:csv]
                a = Array.new

                if data_hash['SHOWBACK_RECORDS']
                    a = data_hash['SHOWBACK_RECORDS']['SHOWBACK']
                end

                AcctHelper::SHOWBACK_TABLE.show(a, options)
                exit(0)
            end

            data_hash.each { |year, value|
                value.each { |month, showback_array|
                    AcctHelper.print_month_header(year, month)

                    array = showback_array['SHOWBACK_RECORDS']['SHOWBACK']
                    AcctHelper::SHOWBACK_TABLE.show(array, options)
                    puts
                }

            }

            exit_code 0
        end
    end

    command :"calculate", "Calculates the showback records", :options =>
            [AcctHelper::START_TIME_SHOWBACK, AcctHelper::END_TIME_SHOWBACK] do


        start_month = -1
        start_year  = -1

        if (options[:start_time])
            start_month = options[:start_time].month
            start_year  = options[:start_time].year
        end

        end_month = -1
        end_year  = -1

        if (options[:end_time])
            end_month = options[:end_time].month
            end_year  = options[:end_time].year
        end

        rc = OpenNebula::VirtualMachinePool.new(helper.client).
                calculate_showback(start_month, start_year, end_month, end_year)

        if OpenNebula.is_error?(rc)
            warn rc.message
            exit -1
        else
            puts rc
            exit_code 0
        end

    end
end